Page 130 - Advances in Textile Biotechnology

Enzymatic modifi cation of polyacrylonitrile and cellulose acetate fi bres 111

Table 5.1 Working solution ingredients for the treatment of acrylic fibres with a
nitrile hydratase preparation extracted from Arthrobacter sp. ECU1101 cells.
Reproduced with permission from the original publisher (Wang et al., 2004)
Samples Enzyme (%, v/v) JFC (%, w/v) DMF (%, v/v)
Control 0 0 0 0
Control 1 5 (inactive) 0.1 0
Sample 1 5 (active) 0 0
Sample 2 5 (active) 0.1 0
Sample 3 5 (active) 0 0.1

Table 5.2 Physical characteristics of samples and controls after treatment with
a nitrile hydratase preparation extracted from Arthrobacter sp. ECU1101 cells.
Reproduced with permission from the original publisher (Wang et al., 2004)

Samples Moisture regain Volume specifi c resistance Water contact angle
(%) (Ω cm) (°)
Control 0 2 1.65 × 10 12 51
Control 1 2.1 9.86 × 10 11 49
Sample 1 2.7 1.25 × 10 10 39
Sample 2 3.1 7.29 × 10 9 31
Sample 3 2.6 2.08 × 10 10 38

Table 5.3 K/S values of acrylic samples stained with acid dyes after treatment
with a nitrile hydratase preparation extracted from Arthrobacter sp. ECU1101
cells. Reproduced with permission from the original publisher (Wang et al.,
2004)

Dyes pH K/S values

Control 0 Control 1 Sample 1 Sample 2 Sample 3
C.I. Acid Black 24 4.5 1.76 1.89 2.16 2.73 2.12
C.I. Acid Red 14 2.0 0.05 0.08 0.12 0.25 0.10
C.I. Acid Blue 25 2.0 3.03 3.12 3.49 3.96 3.41
C.I. Acid Red 249 4.5 0.77 0.87 1.13 2.22 1.42
C.I. Acid Blue 225 4.5 0.16 0.27 0.43 0.57 0.41
C.I. Acid Yellow 16 2.5 0.82 0.95 1.12 1.56 1.20
C.I. Acid Red 1 2.0 0.55 0.64 0.92 1.12 0.89

became more hydrophilic as indicated by the results of moisture regain and
water contact angle; the antistatic ability was also improved on treated

acrylics as shown by the decrease in their volume specific resistance (Table
5.2). Several acid dyes were tested and the biomodified samples all showed

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